| Tail Number / N-Number | N121MC |
| Manufacturer | STINSON |
| Model | L-5 |
| Year Built | 1944 |
| Manufacturer's Serial Number | 761684 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-435A/0-435C |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 190 hp (142 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AIRCRAFT GUARANTY CORP TRUSTEE |
| Street | 928 SW 107TH ST |
| City | OKLAHOMA CITY |
| State | OK |
| Zip Code | 73170-5244 |
| Region | Southwestern |
| County | Oklahoma County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-04-07 |
| Certificate Issue Date | 2017-05-11 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50054177 |
| Mode S Code Hex | A0587F |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121MC.
| Tail Number / N-Number | N121MC |
| Manufacturer | BEECH |
| Model | 95-C55 |
| Manufacturer's Serial Number | TE308 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 165 miles per hour |
| County | Oklahoma County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1988-11-18 |